Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
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Derivative Instruments and Hedging Activities Fair Value Balance Sheet (Details) € in Millions, $ in Millions	Sep. 30, 2018 USD ($)	Apr. 18, 2018 USD ($)	Apr. 18, 2018 EUR (€)	Dec. 31, 2017 USD ($)
Cross currency swaps
Derivatives designated as hedging instruments:
Derivative, notional amount		$ 500.0	€ 404
Designated as Hedging Instrument [Member]
Derivatives designated as hedging instruments:
Derivative asset, fair value, designated as hedging instrument	$ 49.6			$ 0.6
Derivative liability, fair value, designated as hedging instrument	(3.9)			(11.5)
Designated as Hedging Instrument [Member] \| Cross currency swaps \| Other current assets [Member]
Derivatives designated as hedging instruments:
Derivative asset, fair value, designated as hedging instrument	29.4
Designated as Hedging Instrument [Member] \| Cross currency swaps \| Accounts payable and other current liabilities [Member]
Derivatives designated as hedging instruments:
Derivative liability, fair value, designated as hedging instrument	0.0
Designated as Hedging Instrument [Member] \| Interest rate swaps [Member]
Derivatives designated as hedging instruments:
Derivative, notional amount	1,500.0
Designated as Hedging Instrument [Member] \| Interest rate swaps [Member] \| Other non-current assets [Member]
Derivatives designated as hedging instruments:
Derivative asset, fair value, designated as hedging instrument	17.9
Designated as Hedging Instrument [Member] \| Interest rate swaps [Member] \| Other liabilities [Member]
Derivatives designated as hedging instruments:
Derivative liability, fair value, designated as hedging instrument	0.0
Designated as Hedging Instrument [Member] \| Foreign currency forwards [Member] \| Other current assets [Member]
Derivatives designated as hedging instruments:
Derivative asset, fair value, designated as hedging instrument	1.0			0.4
Designated as Hedging Instrument [Member] \| Foreign currency forwards [Member] \| Other non-current assets [Member]
Derivatives designated as hedging instruments:
Derivative asset, fair value, designated as hedging instrument	1.3			0.2
Designated as Hedging Instrument [Member] \| Foreign currency forwards [Member] \| Accounts payable and other current liabilities [Member]
Derivatives designated as hedging instruments:
Derivative liability, fair value, designated as hedging instrument	(2.1)			(6.1)
Designated as Hedging Instrument [Member] \| Foreign currency forwards [Member] \| Other liabilities [Member]
Derivatives designated as hedging instruments:
Derivative liability, fair value, designated as hedging instrument	(1.8)			(5.4)
Not Designated as Hedging Instrument [Member]
Derivatives not designated as hedging instruments:
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	74.8			134.5
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	(14.2)			(11.7)
Not Designated as Hedging Instrument [Member] \| Commodity swaps [Member]
Derivatives designated as hedging instruments:
Derivative, notional amount	764.1			765.0
Not Designated as Hedging Instrument [Member] \| Commodity swaps [Member] \| Other current assets [Member]
Derivatives not designated as hedging instruments:
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	46.2			70.8
Not Designated as Hedging Instrument [Member] \| Commodity swaps [Member] \| Other non-current assets [Member]
Derivatives not designated as hedging instruments:
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	28.6			63.5
Not Designated as Hedging Instrument [Member] \| Commodity swaps [Member] \| Accounts payable and other current liabilities [Member]
Derivatives not designated as hedging instruments:
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	(8.7)			(7.3)
Not Designated as Hedging Instrument [Member] \| Commodity swaps [Member] \| Other liabilities [Member]
Derivatives not designated as hedging instruments:
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	(5.5)			(4.2)
Not Designated as Hedging Instrument [Member] \| Commodity Option [Member]
Derivatives designated as hedging instruments:
Derivative, notional amount				30.6
Not Designated as Hedging Instrument [Member] \| Commodity Option [Member] \| Other non-current assets [Member]
Derivatives not designated as hedging instruments:
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value				0.2
Not Designated as Hedging Instrument [Member] \| Commodity Option [Member] \| Other liabilities [Member]
Derivatives not designated as hedging instruments:
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value				(0.2)
Cash Flow Hedging [Member] \| Designated as Hedging Instrument [Member] \| Cross currency swaps
Derivatives designated as hedging instruments:
Derivative, notional amount	500.0
Cash Flow Hedging [Member] \| Designated as Hedging Instrument [Member] \| Foreign currency forwards [Member]
Derivatives designated as hedging instruments:
Derivative, notional amount	$ 358.8			$ 326.4